"There is a plan in place right now to accomplish draining the lake. We can't go any further than that, then to tell you that is being looked at right now," said Commissioner Tom Jones.

In Kerrville, authorities went door-to-door to some homes early Sunday to alert people that flooding was again possible.

Forecasters explained that two mesoscale convection vortexes — one near Waco, and one near the Rio Grande — pulled in storm cells and placed them in circling patterns over the same areas, unleashing more dangerous floodwaters.